:root {
  /* Background colors */
  --tl-bg: #05070b;
  --tl-bg-card: #0c101b;
  --tl-bg-surface: #141926;
  --tl-bg-elevated: #1c2333;
  --tl-bg-input: #1a1f2e;
  --tl-bg-hover: #2a3352;
  --tl-bg-dark: #020617;
  --tl-bg-darker: #0b1220;
  --tl-bg-light: #f7f7f7;
  --tl-bg-light-gray: #e0e0e0;
  --tl-bg-subtle: #0e1117;
  --tl-bg-header-start: #151b2e;
  --tl-bg-header-end: #0c1019;
  --tl-bg-gradient-start: #181c26;
  --tl-bg-gradient-end: #050609;
  --tl-bg-nav-dropdown: #161c2e;

  /* Accent colors - RGB base for opacity variations */
  --tl-accent: #4c6fff;
  --tl-accent-rgb: 76, 111, 255;
  --tl-accent-hover: #6b8aff;
  --tl-accent-light: #93b4ff;
  --tl-accent-lighter: #b4ccff;
  --tl-accent-lightest: #bfdbfe;

  /* Text colors */
  --tl-text: #f5f5f5;
  --tl-text-muted: #8899aa;
  --tl-text-dim: #556677;
  --tl-text-light: #f0f2f7;
  --tl-text-lighter: #e2e6f0;
  --tl-text-lighter2: #d0d4e4;
  --tl-text-lighter3: #c3c7de;
  --tl-text-lighter4: #d0d8f0;
  --tl-text-lighter5: #a0afc0;
  --tl-text-lighter6: #c0c8dc;
  --tl-text-lighter7: #9ca3af;
  --tl-text-light-gray: #b0b8cc;
  --tl-text-blue: #60a5fa;
  --tl-text-gray: #9ca3af;
  --tl-text-light-accent: #aac4ff;
  --tl-text-purple: #d0a8ff;
  --tl-text-light-muted: #8a9bc0;

  /* Danger/Error colors */
  --tl-danger: #e74c3c;
  --tl-danger-light: #ffbaba;
  --tl-danger-lighter: #ff8080;
  --tl-danger-lightest: #fecaca;
  --tl-danger-outline: #ff6b6b;

  /* Success colors */
  --tl-success: #2ecc71;
  --tl-success-light: #34d399;
  --tl-success-lighter: #4ade80;
  --tl-success-fade: #a8d8a8;

  /* Warning colors */
  --tl-warning: #f39c12;
  --tl-warning-light: #fbbf24;
  --tl-warning-lighter: #fcd34d;
  --tl-warning-gold: #f5a623;
  --tl-warning-gold-light: #ffbe4a;
  --tl-warning-orange: #f97316;
  --tl-warning-orange-lighter: #ffd27f;

  /* Info/Blue colors */
  --tl-info-cyan: #9ce6ff;
  --tl-info-blue-light: #93c5fd;

  /* Border & Divider colors */
  --tl-border: rgba(255,255,255,0.08);
  --tl-border-dark: #1f2937;
  --tl-border-accent-10: rgba(76,111,255,0.1);
  --tl-border-accent-15: rgba(76,111,255,0.15);
  --tl-border-accent-25: rgba(76,111,255,0.25);
  --tl-border-accent-30: rgba(76,111,255,0.30);
  --tl-border-accent-35: rgba(76,111,255,0.35);
  --tl-border-accent-50: rgba(76,111,255,0.50);
  --tl-border-left: #2a3654;
  --tl-border-bottom: #1e2a3a;

  /* Background accents (low opacity overlays) */
  --tl-bg-accent-04: rgba(76,111,255,0.04);
  --tl-bg-accent-06: rgba(76,111,255,0.06);
  --tl-bg-accent-07: rgba(76,111,255,0.07);
  --tl-bg-accent-08: rgba(76,111,255,0.08);
  --tl-bg-accent-10: rgba(76,111,255,0.10);
  --tl-bg-accent-15: rgba(76,111,255,0.15);
  --tl-bg-accent-18: rgba(76,111,255,0.18);
  --tl-bg-accent-20: rgba(76,111,255,0.20);
  --tl-bg-warning-18: rgba(250,204,21,.18);
  --tl-bg-blue-20: rgba(96,165,250,.20);

  /* Border accents (warning) */
  --tl-border-warning-55: rgba(250,204,21,.55);
  --tl-border-blue-55: rgba(96,165,250,.55);

  /* Special colors */
  --tl-text-gradient-orange: #f97316;
  --tl-text-gradient-red: #ef4444;

  /* Z-index scale */
  --tl-z-dropdown: 500;
  --tl-z-modal: 1000;

  /* Radius */
  --tl-radius: 10px;
  --tl-radius-sm: 6px;
  --tl-radius-lg: 16px;

  /* Font */
  --tl-font: 'IBM Plex Sans', system-ui, -apple-system, sans-serif;
  --tl-font-mono: 'JetBrains Mono', 'Consolas', monospace;

  /* Transition */
  --tl-transition: 0.2s ease;
}

/* Force dark mode regardless of OS/browser preference */
:root { color-scheme: dark only; }

body {
  margin: 0;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: var(--tl-bg);
  color: var(--tl-text);
}

/* Professional scrollbar styling */
::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}

::-webkit-scrollbar-track {
  background: transparent;
}

::-webkit-scrollbar-thumb {
  background: rgba(255,255,255,0.15);
  border-radius: 3px;
  transition: background 150ms ease;
}

::-webkit-scrollbar-thumb:hover {
  background: rgba(255,255,255,0.25);
}

/* Firefox scrollbar */
* {
  scrollbar-width: thin;
  scrollbar-color: rgba(255,255,255,0.15) transparent;
}
/* When loaded inside an iframe (e.g., owner dashboard SPA), hide redundant header and expand content */
body.in-iframe header { display: none !important; }
body.in-iframe .wrap { max-width: none !important; margin-left: 0 !important; margin-right: 0 !important; width: 100% !important; box-sizing: border-box !important; }
body.in-iframe { margin: 0 !important; padding: 0 !important; width: 100% !important; box-sizing: border-box !important; }

/* ═══════════════════════════════════════════════════════
   HEADER — 3-row professional layout
   Row 1: Brand bar (title + session info)
   Row 2: Navigation tabs
   Row 3: Profile bar
   ═══════════════════════════════════════════════════════ */
header {
  background: linear-gradient(180deg, var(--tl-bg-header-start) 0%, var(--tl-bg-header-end) 100%);
  display: flex;
  flex-direction: column;
  border-bottom: 1px solid rgba(255,255,255,0.07);
}
/* ── Row 1: Brand bar ── */
.hdr-brand-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.45rem 1.25rem 0.3rem;
  gap: 1rem;
  border-bottom: 1px solid rgba(255,255,255,0.08);
  background: linear-gradient(180deg, var(--tl-bg-accent-04) 0%, transparent 100%);
  transition: border-color 150ms ease;
}
.hdr-brand {
  display: flex;
  align-items: baseline;
  gap: 0.6rem;
  flex-shrink: 0;
}
.hdr-brand h1 {
  margin: 0;
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--tl-text-light);
}
.hdr-version {
  font-size: 0.7rem;
  color: rgba(255,255,255,0.4);
  font-weight: 500;
  padding: 0.15rem 0.4rem;
  border-radius: 4px;
  background: var(--tl-bg-accent-08);
  border: 1px solid var(--tl-border-accent-15);
  transition: background 150ms ease, border-color 150ms ease;
}

.hdr-version:hover {
  background: var(--tl-bg-accent-15);
  border-color: var(--tl-border-accent-25);
  color: rgba(255,255,255,0.6);
}
.hdr-session {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-shrink: 0;
}

/* ── Row 2: Navigation ── */
.hdr-nav {
  display: flex;
  align-items: center;
  gap: 0.3rem;
  padding: 0.4rem 1.25rem;
  flex-wrap: wrap;
  row-gap: 0.35rem;
  border-bottom: 1px solid rgba(255,255,255,0.08);
  transition: border-color 150ms ease;
}
.hdr-nav > button {
  background: transparent;
  color: var(--tl-text-light-gray);
  border: 1px solid transparent;
  border-radius: 6px;
  padding: 0.3rem 0.65rem;
  cursor: pointer;
  font-size: 0.78rem;
  font-weight: 500;
  transition: background-color 120ms ease, border-color 120ms ease, color 120ms ease;
  white-space: nowrap;
}
.hdr-nav > button:hover {
  color: var(--tl-text-lighter);
  background: rgba(255,255,255,0.06);
  border-color: rgba(255,255,255,0.1);
}
.hdr-nav > button.active {
  background: var(--tl-bg-accent-15);
  color: var(--tl-accent-light);
  border-color: var(--tl-border-accent-35);
  font-weight: 600;
  border-bottom: 2px solid var(--tl-accent);
  padding-bottom: calc(0.3rem - 1px);
}
.hdr-nav-sep {
  width: 1px;
  height: 18px;
  background: rgba(255,255,255,0.12);
  margin: 0 0.25rem;
  flex-shrink: 0;
}

/* ── Nav color groups ── */
.hdr-nav > button.nav-tuning {
  background: rgba(245,166,35,0.08);
  color: var(--tl-warning-gold);
  border-color: rgba(245,166,35,0.25);
}
.hdr-nav > button.nav-tuning:hover {
  background: rgba(245,166,35,0.15);
  color: var(--tl-warning-gold-light);
}
.hdr-nav > button.nav-report {
  background: rgba(34,197,94,0.08);
  color: var(--tl-success-light);
  border-color: rgba(34,197,94,0.25);
}
.hdr-nav > button.nav-report:hover {
  background: rgba(34,197,94,0.15);
  color: var(--tl-success-lighter);
}
.hdr-nav > button.nav-tool {
  background: var(--tl-bg-accent-10);
  color: var(--tl-info-blue-light);
  border-color: var(--tl-border-accent-30);
}
.hdr-nav > button.nav-tool:hover {
  background: var(--tl-bg-accent-18);
  color: var(--tl-accent-lightest);
}
.hdr-nav > button.nav-community {
  background: rgba(250,204,21,0.08);
  color: var(--tl-warning-light);
  border-color: rgba(250,204,21,0.25);
}
.hdr-nav > button.nav-community:hover {
  background: rgba(250,204,21,0.15);
  color: var(--tl-warning-lighter);
}

/* ── Row 3: Profile bar ── */
.hdr-profile-bar {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.3rem 1.25rem;
  flex-wrap: wrap;
  background: rgba(0,0,0,0.18);
  border-top: 1px solid var(--tl-border-accent-10);
  transition: background 150ms ease, border-color 150ms ease;
}
.hdr-profile-bar .label {
  font-weight: 600;
  font-size: 0.82rem;
  color: rgba(255,255,255,0.55);
  flex-shrink: 0;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
.hdr-profile-bar select {
  min-width: 200px;
  max-width: 380px;
  flex: 1 1 200px;
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: 6px;
  color: var(--tl-text-lighter);
  padding: 0.3rem 0.5rem;
  font-size: 0.82rem;
  transition: background 150ms ease, border-color 150ms ease, box-shadow 150ms ease;
}

.hdr-profile-bar select:focus {
  background: var(--tl-bg-accent-08);
  border-color: var(--tl-border-accent-35);
}
.hdr-profile-actions {
  display: flex;
  gap: 0.3rem;
  flex-shrink: 0;
  align-items: center;
}

.hdr-profile-actions button {
  font-size: 0.72rem;
  padding: 0.2rem 0.5rem;
  border-radius: 4px;
  transition: all 150ms ease;
}

.hdr-profile-actions button:hover {
  background: var(--tl-bg-accent-15);
  border-color: var(--tl-border-accent-35);
}

header h1 {
  margin: 0;
  font-size: 1.15rem;
}

/* Legacy compatibility: .nav-tabs now maps to .hdr-nav */
.nav-tabs {
  display: flex;
  gap: 0.5rem;
}
.nav-tabs button {
  background: transparent;
  color: var(--tl-text-lighter2);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: 999px;
  padding: 0.25rem 0.75rem;
  cursor: pointer;
  font-size: 0.8rem;
}
.nav-tabs button.active {
  background: var(--tl-accent);
  color: #fff;
  border-color: var(--tl-accent);
}

main {
  padding: 1rem;
  max-width: 1200px;
  margin: 0 auto;
}

/* Page transitions — smooth fade when switching tabs.
   Scoped to main > .page so standalone pages (hub.html, etc.)
   that use <main class="page"> are not hidden by this rule. */
main > .page {
  display: none;
  opacity: 0;
  transition: opacity 200ms ease;
}

main > .page.active {
  display: block;
  opacity: 1;
  animation: fadeIn 200ms ease;
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(2px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.card {
  background: var(--tl-bg-card);
  border-radius: 12px;
  padding: 0.85rem 1rem;
  margin-bottom: 0.85rem;
  border: 1px solid var(--tl-border);
  box-shadow: 0 8px 24px rgba(0,0,0,0.4);
  transition: transform 150ms ease, box-shadow 150ms ease, border-color 150ms ease;
}

.card:hover {
  transform: translateY(-1px);
  box-shadow: 0 12px 32px rgba(0,0,0,0.5);
  border-color: var(--tl-border-accent-15);
}

.card h2 {
  margin-top: 0;
  font-size: 1rem;
}

label {
  display: block;
  font-size: 0.8rem;
  margin-top: 0.3rem;
  margin-bottom: 0.1rem;
  color: var(--tl-text-lighter3);
  font-weight: 500;
  transition: color 150ms ease;
}

label:hover {
  color: var(--tl-text-lighter);
}

input, select, textarea {
  width: 100%;
  box-sizing: border-box;
  border-radius: 6px;
  border: 1px solid rgba(255,255,255,0.25);
  padding: 0.25rem 0.4rem;
  background: var(--tl-bg);
  color: var(--tl-text);
  font-size: 0.85rem;
}
/* Ensure dropdown option text is readable on browser-default white backgrounds */
select option {
  background: var(--tl-bg-input);
  color: var(--tl-text);
}
select option:checked {
  background: var(--tl-bg-hover);
  color: #fff;
}

textarea {
  min-height: 60px;
  resize: vertical;
}

.grid-2 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 0.75rem;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.78rem;
  margin-top: 0.25rem;
  transition: border-color 150ms ease;
}

th, td {
  border: 1px solid rgba(255,255,255,0.12);
  padding: 0.2rem 0.35rem;
  text-align: left;
  transition: background 150ms ease;
}

th {
  background: rgba(255,255,255,0.05);
  font-weight: 600;
  color: var(--tl-text-lighter);
}

tr:hover td {
  background: var(--tl-bg-accent-06);
}

button.primary, .btn.primary {
  background: var(--tl-accent);
  border-color: var(--tl-accent);
  color: #fff;
}

button.danger {
  border-color: var(--tl-danger-outline);
  color: var(--tl-danger-light);
}

button.small, .btn.small {
  font-size: 0.75rem;
  padding: 0.2rem 0.6rem;
}

/* Admin: Global Locations preview chips (high-contrast for readability) */
.chip-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-top: 0.35rem;
}

.loc-chip {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.2rem 0.55rem;
  border-radius: 999px;
  /* Use a dark chip background so the text stays readable even if the theme changes */
  background-color: rgba(0,0,0,0.35);
  border: 1px solid rgba(255,255,255,0.18);
  color: var(--tl-text);
}

.loc-chip button {
  border-radius: 999px;
  border: 1px solid rgba(255,255,255,0.22);
  background-color: rgba(255,255,255,0.08);
  color: var(--tl-text);
  padding: 0.12rem 0.45rem;
  font-size: 0.72rem;
}

.loc-chip button:hover {
  border-color: rgba(255,255,255,0.28);
  background-color: rgba(255,255,255,0.14);
}

.wizard-overlay {
  position: fixed;
  inset: 0;
  background: rgba(5, 6, 8, 0.92);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 999;
  animation: fadeIn 200ms ease;
}

.wizard-overlay.hidden {
  display: none;
}

.wizard-card {
  width: min(720px, 95vw);
  max-height: 90vh;
  overflow-y: auto;
  background: radial-gradient(circle at top left, var(--tl-bg-gradient-start), var(--tl-bg-gradient-end));
  border-radius: 16px;
  border: 1px solid rgba(255,255,255,0.12);
  padding: 1.25rem 1.5rem;
  box-shadow: 0 30px 80px rgba(0,0,0,0.7);
  animation: slideUp 250ms ease;
}

@keyframes slideUp {
  from {
    transform: translateY(16px);
    opacity: 0;
  }
  to {
    transform: translateY(0);
    opacity: 1;
  }
}

.wizard-section {
  margin-top: 0.75rem;
  border-top: 1px solid rgba(255,255,255,0.08);
  padding-top: 0.5rem;
}

#diagList {
  list-style: none;
  padding-left: 0;
  margin: 0;
  font-size: 0.8rem;
}
#diagList li {
  margin-bottom: 0.2rem;
}
.diag-issue {
  color: var(--tl-danger-lighter);
}
.diag-warning {
  color: var(--tl-warning-orange-lighter);
}
.diag-info {
  color: var(--tl-info-cyan);
}

.rta-canvas-wrapper {
  width: 100%;
  height: 220px;
  background: var(--tl-bg-subtle);
  border-radius: 8px;
  border: 1px solid rgba(255,255,255,0.12);
  position: relative;
  overflow: hidden;
  margin-top: 0.5rem;
}

#rtaCanvas {
  width: 100%;
  height: 100%;
}

/* audioMotion container fills wrapper */
#rtaMotionContainer,
#rtaMotionContainerFull {
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 100%;
  z-index: 1;
}

/* Overlay canvas for ref/diff/cursor/regions — on top of audioMotion */
#rtaOverlayCanvas,
#rtaOverlayCanvasFull {
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 100%;
  z-index: 2;
  pointer-events: auto;
}


/* ── Tank mascot logo (global) ── */
.tank-mark {
  width: 28px;
  height: 28px;
  border-radius: 6px;
  background: var(--tl-accent, #4c6fff);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  overflow: hidden;
}
.tank-mark img { width: 100%; height: 100%; object-fit: cover; border-radius: 6px; }
.tank-mark-fb  { font-size: 14px; line-height: 1; display: none; }
.tank-mark--lg { width: 56px; height: 56px; border-radius: 10px; }
.tank-mark--lg img { border-radius: 10px; }

/* Garage Build vs Shop header enhancements */
.header-title {
  display: flex;
  flex-direction: row;
  align-items: center;
  gap: 0.5rem;
}

.header-nav {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.edition-badge {
  font-size: 0.65rem;
  color: rgba(147,180,255,0.8);
  padding: 0.12rem 0.45rem;
  border-radius: 4px;
  border: 1px solid var(--tl-border-accent-25);
  background: var(--tl-bg-accent-08);
  display: inline-block;
  font-weight: 500;
  letter-spacing: 0.02em;
}

/* License overlay adjustments (reuse wizard styles) */
#licenseKeyInput {
  width: 100%;
  min-height: 80px;
  resize: vertical;
}

/* About / License modal */
.about-overlay {
  position: fixed;
  inset: 0;
  z-index: var(--tl-z-modal);
  display: none;
  /* Allow scrolling when content exceeds viewport */
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  padding: 4vh 2vw;
}

.about-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(15, 23, 42, 0.7);
}

.about-card {
  position: relative;
  /* Wider, less tall layout so content fits without trapping the user */
  width: min(980px, 96vw);
  max-width: none;
  margin: 0 auto;
  max-height: calc(100vh - 8vh);
  overflow-y: auto;
  background: var(--tl-bg);
  border-radius: 16px;
  border: 1px solid rgba(255,255,255,0.15);
  padding: 16px 18px 12px;
  color: var(--tl-text);
  box-shadow: 0 20px 45px rgba(0, 0, 0, 0.7);
}

.about-card h2 {
  margin: 0 0 4px;
  font-size: 1.1rem;
}
.about-sub {
  margin: 0 0 10px;
  font-size: 0.8rem;
  color: var(--tl-text-gray);
}
.about-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  font-size: 0.8rem;
  margin-bottom: 10px;
}
@media (max-width: 560px) {
  .about-grid {
    grid-template-columns: minmax(0, 1fr);
  }
}
.about-note {
  font-size: 0.75rem;
  color: var(--tl-text-gray);
  margin-top: 4px;
}
.about-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.75rem;
  color: var(--tl-text-gray);
}
#btnAboutClose {
  border-radius: 999px;
  border: 1px solid rgba(255,255,255,0.2);
  background: transparent;
  color: var(--tl-text-lighter);
  padding: 4px 12px;
  font-size: 0.8rem;
  cursor: pointer;
}


/* Tools page helpers */
.tool-output {
  margin-top: 0.5rem;
  padding: 0.5rem 0.75rem;
  background: var(--tl-bg-dark);
  border-radius: 8px;
  border: 1px solid var(--tl-border-dark);
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
  font-size: 0.8rem;
  white-space: pre-wrap;
}
.tool-button-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  margin-top: 0.35rem;
}
.level-meter-bar {
  position: relative;
  width: 100%;
  height: 12px;
  border-radius: 999px;
  background: var(--tl-bg-dark);
  border: 1px solid var(--tl-border-dark);
  overflow: hidden;
}
.level-meter-fill {
  position: absolute;
  inset: 0;
  width: 5%;
  background: linear-gradient(90deg, #22c55e, var(--tl-warning-orange), var(--tl-text-gradient-red));
  transform-origin: left center;
  transform: scaleX(0.1);
  transition: transform 0.1s linear;
}
.trouble-item {
  margin-top: 0.3rem;
}
.trouble-item summary {
  cursor: pointer;
  font-weight: 600;
}
.trouble-item ul {
  margin: 0.35rem 0 0.25rem 1.1rem;
}


/* Demo mode badge */
.demo-badge {
  display: inline-flex;
  align-items: center;
  padding: 0.1rem 0.5rem;
  border-radius: 999px;
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  background: var(--tl-warning-orange);
  color: #000;
  margin-left: 0.35rem;
}


.page-actions {
  margin-top: 1.5rem;
  display: flex;
  justify-content: flex-end;
  gap: 0.75rem;
  align-items: center;
}


.global-profile-bar {
  margin-bottom: 0;
  padding: 0.5rem 0.75rem;
  background: rgba(0, 0, 0, 0.5);
  border-radius: 0.5rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.global-profile-bar .label {
  font-weight: 600;
  font-size: 0.9rem;
}

.global-profile-bar select {
  min-width: 220px;
}



.help-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1rem;
  height: 1rem;
  margin-left: 0.35rem;
  border-radius: 50%;
  font-size: 0.65rem;
  border: 1px solid #999;
  cursor: pointer;
  background: var(--tl-bg-light);
  padding: 0;
  transition: all 150ms ease;
  user-select: none;
}

.help-icon:hover {
  background: var(--tl-bg-light-gray);
  transform: scale(1.08);
  box-shadow: 0 2px 8px rgba(0,0,0,0.15);
}

.help-icon:active {
  transform: scale(0.96);
}





/* ===== Master Login Modal ===== */
.tl-modal-overlay{
  position:fixed;
  inset:0;
  background:rgba(0,0,0,0.55);
  display:flex;
  align-items:center;
  justify-content:center;
  z-index:9999;
}
.tl-modal{
  width:min(520px, calc(100vw - 32px));
  background:var(--tl-bg-dark);
  border:1px solid rgba(255,255,255,0.12);
  border-radius:14px;
  box-shadow:0 18px 60px rgba(0,0,0,0.55);
  color:var(--tl-text-lighter);
}
.tl-modal-header{
  display:flex;
  align-items:center;
  justify-content:space-between;
  padding:14px 16px;
  border-bottom:1px solid rgba(255,255,255,0.10);
}
.tl-modal-title{
  font-size:16px;
  font-weight:700;
}
.tl-modal-close{
  background:transparent;
  border:0;
  color:var(--tl-text-lighter);
  font-size:22px;
  line-height:1;
  cursor:pointer;
}
.tl-modal-body{
  padding:14px 16px 10px 16px;
}
.tl-modal-body .tl-field{
  margin-bottom:10px;
}
.tl-modal-body label{
  display:block;
  font-size:12px;
  opacity:0.9;
  margin-bottom:4px;
}
.tl-modal-body input{
  width:100%;
  padding:10px 10px;
  border-radius:10px;
  border:1px solid rgba(255,255,255,0.15);
  background:var(--tl-bg-darker);
  color:var(--tl-text-lighter);
}
.tl-modal-error{
  margin-top:8px;
  padding:10px;
  border-radius:10px;
  border:1px solid rgba(239,68,68,0.35);
  background:rgba(239,68,68,0.08);
  color: var(--tl-danger-lightest);
  font-size:12px;
}
.tl-modal-footer{
  display:flex;
  gap:10px;
  justify-content:flex-end;
  padding:12px 16px 16px 16px;
}
.tl-admin-session-row{
  display:flex;
  gap:10px;
  align-items:center;
  justify-content:space-between;
  margin:6px 0 10px 0;
}
.tl-small-muted{ font-size:12px; opacity:0.8; }


/* Professional polish — nav tabs */
.nav-tabs { flex-wrap: wrap; row-gap: 0.4rem; align-items: center; }
.nav-tabs button { transition: background-color 120ms ease, border-color 120ms ease, transform 80ms ease; }
.nav-tabs button:hover { border-color: rgba(255,255,255,0.25); }
.nav-tabs button:active { transform: translateY(1px); }
.hdr-nav > button:active { transform: translateY(1px); }

/* Tools dropdown */
.nav-dropdown { position: relative; display: inline-flex; }
.nav-dropdown-toggle {
  background: var(--tl-bg-accent-10);
  color: var(--tl-accent-light);
  border: 1px solid var(--tl-border-accent-30);
  border-radius: 6px;
  padding: 0.3rem 0.7rem;
  cursor: pointer;
  font-size: 0.78rem;
  font-weight: 600;
  transition: background-color 120ms ease, border-color 120ms ease, color 120ms ease;
}
.nav-dropdown-toggle:hover { background: var(--tl-bg-accent-20); border-color: var(--tl-border-accent-50); color: #b4ccff; }
.nav-dropdown-menu {
  display: none;
  position: absolute;
  top: calc(100% + 6px);
  right: 0;
  z-index: 2000;
  background: var(--tl-bg-nav-dropdown);
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: 8px;
  padding: 0.3rem 0;
  min-width: 195px;
  box-shadow: 0 12px 40px rgba(0,0,0,0.6), 0 0 0 1px rgba(255,255,255,0.04);
  backdrop-filter: blur(12px);
}
.nav-dropdown-menu.open { display: block; }
.nav-dropdown-menu a {
  display: block;
  padding: 0.42rem 0.85rem;
  color: var(--tl-text-lighter6);
  text-decoration: none;
  font-size: 0.8rem;
  white-space: nowrap;
  transition: background-color 80ms ease, color 80ms ease;
  border-radius: 4px;
  margin: 0 0.2rem;
}
.nav-dropdown-menu a:hover { background: var(--tl-bg-accent-15); color: #fff; }
.nav-dropdown-sep {
  height: 1px;
  background: rgba(255,255,255,0.08);
  margin: 0.3rem 0.6rem;
}

/* Colored nav buttons (Expert's Corner, Ask AI) */
.tb-btn-gold {
  background: rgba(250,204,21,.10);
  border-color: rgba(250,204,21,.35);
  color: var(--tl-warning-light);
  font-weight: 600;
}
.tb-btn-gold:hover { background: var(--tl-bg-warning-18); border-color: var(--tl-border-warning-55); color: var(--tl-warning-lighter); }
.tb-btn-blue {
  background: rgba(96,165,250,.10);
  border-color: rgba(96,165,250,.35);
  color: var(--tl-text-blue);
  font-weight: 600;
}
.tb-btn-blue:hover { background: var(--tl-bg-blue-20); border-color: var(--tl-border-blue-55); color: var(--tl-info-blue-light); }

/* Session info in header brand bar */
.hdr-session-info {
  font-size: 0.72rem;
  color: rgba(255,255,255,0.45);
  line-height: 1.35;
  text-align: right;
  white-space: nowrap;
}
.hdr-session-logout {
  background: rgba(239,68,68,0.08);
  border: 1px solid rgba(239,68,68,0.25);
  color: var(--tl-danger-light);
  border-radius: 6px;
  padding: 0.22rem 0.55rem;
  font-size: 0.72rem;
  cursor: pointer;
  font-weight: 500;
  transition: background-color 120ms ease, border-color 120ms ease, color 120ms ease;
}
.hdr-session-logout:hover {
  background: rgba(239,68,68,0.15);
  border-color: rgba(239,68,68,0.45);
  color: var(--tl-danger-lightest);
}
/* Legacy compat */
#tlSessionPill { display: contents; }

button, .btn {
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.14);
  color: var(--tl-text);
  border-radius: 10px;
  padding: 0.45rem 0.75rem;
  font-size: 0.85rem;
  transition: all 150ms ease;
  cursor: pointer;
  font-weight: 500;
}

button.small { padding: 0.25rem 0.55rem; border-radius: 999px; font-size: 0.78rem; }
button.danger { background: rgba(255,70,70,0.10); border-color: rgba(255,70,70,0.30); }

button:hover, .btn:hover {
  border-color: rgba(255,255,255,0.26);
  background: rgba(255,255,255,0.08);
  transform: translateY(-1px);
}

button:active, .btn:active {
  transform: translateY(0);
}

button.danger:hover { border-color: rgba(255,70,70,0.55); background: rgba(255,70,70,0.14); }

button.primary, .btn.primary {
  background: var(--tl-accent);
  border-color: var(--tl-accent);
  color: #fff;
  font-weight: 600;
}

button.primary:hover, .btn.primary:hover {
  background: var(--tl-accent-hover);
  border-color: var(--tl-accent-hover);
  box-shadow: 0 4px 12px rgba(var(--tl-accent-rgb), 0.3);
}

input:focus, select:focus, textarea:focus {
  border-color: var(--tl-accent);
  box-shadow: 0 0 0 3px rgba(var(--tl-accent-rgb), 0.2);
  transition: border-color 150ms ease, box-shadow 150ms ease;
}

/* Professional input polish — state transitions */
input, select, textarea {
  transition: border-color 150ms ease, box-shadow 150ms ease, background-color 150ms ease;
}

input:disabled, select:disabled, textarea:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.card h2 { display:flex; align-items:center; gap:0.5rem; }
.card h3 { margin: 0.25rem 0 0.35rem; }
.hint { color: rgba(245,245,245,0.72); line-height: 1.35; }

table tr:nth-child(even) td { background: rgba(255,255,255,0.02); }

/* ── Responsive Breakpoints (Mobile First) ── */

/* Extra-Small phones (320px and below) */
@media (max-width: 320px) {
  .hdr-brand h1 { font-size: 0.85rem; }
  .hdr-brand-bar { padding: 0.35rem 0.5rem; flex-wrap: wrap; }
  .hdr-nav { padding: 0.3rem 0.5rem; }
  .hdr-nav > button { font-size: 0.65rem; padding: 0.2rem 0.4rem; }
  .hdr-profile-bar { padding: 0.3rem 0.5rem; }
  .hdr-profile-bar select { font-size: 0.75rem; min-width: 120px; }
  main { padding: 0.5rem; }
  .container { padding: 0 0.5rem 2rem 0.5rem; }
  .grid { grid-template-columns: 1fr; }
}

/* Small phones (560px) */
@media (max-width: 560px) {
  .about-grid { grid-template-columns: minmax(0, 1fr); }
}

/* Tablets (760px) */
@media (max-width: 760px) {
  .hdr-brand h1 { font-size: 1rem; }
  .hdr-brand-bar { padding: 0.45rem 0.75rem 0.35rem; flex-wrap: wrap; }
  .hdr-nav { padding: 0.35rem 0.75rem; }
  .hdr-nav > button { font-size: 0.72rem; padding: 0.25rem 0.5rem; }
  .hdr-profile-bar { padding: 0.35rem 0.75rem 0.45rem; }
  .hdr-profile-bar select { min-width: 150px; }
  main { padding: 0.75rem; }
  .grid { grid-template-columns: 1fr; }
}

/* Small desktops (960px) */
@media (max-width: 960px) {
  .hdr-brand-bar { flex-wrap: wrap; }
  .hdr-nav { padding: 0.35rem 0.75rem; }
  .hdr-profile-bar { padding: 0.35rem 0.75rem 0.45rem; }
}

/* ── Shared utility classes used by affiliate/admin pages ── */
.container { max-width: 1100px; margin: 0 auto; padding: 0 1rem 2rem 1rem; }
.muted { opacity: 0.78; font-size: 0.87rem; }
.grid { display: grid; grid-template-columns: 1fr 1fr; gap: 0.75rem; }

/* Large desktop (1200px and above) */
@media (min-width: 1200px) {
  .container { max-width: 1400px; margin: 0 auto; padding: 0 2rem 2rem 2rem; }
  .grid { grid-template-columns: repeat(3, 1fr); gap: 1.5rem; }
  main { font-size: 1.05rem; }
  .hdr-brand h1 { font-size: 1.3rem; }
  body { font-size: 1.1rem; }
}
.table { width: 100%; border-collapse: collapse; font-size: 0.82rem; }
.table th, .table td { border-bottom: 1px solid rgba(255,255,255,0.10); padding: 0.45rem 0.4rem; text-align: left; vertical-align: top; }
.table th { opacity: 0.85; background: rgba(255,255,255,0.04); }
.small { font-size: 0.78rem; }
button.secondary, .btn.secondary { border-color: rgba(255,255,255,0.2); color: rgba(245,245,245,0.8); background: transparent; }
button.secondary:hover, .btn.secondary:hover { border-color: rgba(255,255,255,0.35); }
.btn-secondary { cursor: pointer; border-radius: 999px; border: 1px solid rgba(255,255,255,0.2); background: transparent; color: rgba(245,245,245,0.8); padding: 0.25rem 0.7rem; font-size: 0.8rem; }

/* ── AI Advisor Styles ─────────────────────────────────────────────── */
.ai-advisor-result { font-size: 0.82rem; line-height: 1.6; }
.ai-advisor-result h3 { font-size: 0.95rem; margin: 0 0 0.5rem; color: var(--tl-text-blue); }
.ai-advisor-result h4 { font-size: 0.85rem; margin: 0.75rem 0 0.35rem; }
.ai-summary { background: var(--tl-bg-accent-07); border: 1px solid var(--tl-border-accent-25); border-radius: 6px; padding: 0.65rem 0.85rem; margin-bottom: 0.75rem; }
.ai-table { font-size: 0.78rem; width: 100%; border-collapse: collapse; margin: 0.5rem 0; }
.ai-table th, .ai-table td { border-bottom: 1px solid rgba(255,255,255,0.1); padding: 0.35rem 0.4rem; text-align: left; vertical-align: top; }
.ai-table th { opacity: 0.85; background: rgba(255,255,255,0.04); font-size: 0.75rem; }
.ai-warnings { background: rgba(251,191,36,0.07); border: 1px solid rgba(251,191,36,0.25); border-radius: 6px; padding: 0.5rem 0.75rem; margin: 0.5rem 0; }
.ai-details { margin-top: 0.5rem; }
.ai-details summary { cursor: pointer; font-size: 0.82rem; font-weight: 600; color: var(--tl-text-blue); }
.ai-details p { white-space: pre-wrap; margin-top: 0.35rem; opacity: 0.85; }
.ai-badge { display: inline-block; padding: 1px 6px; border-radius: 3px; font-size: 0.68rem; font-weight: 700; background: rgba(96,165,250,0.2); color: var(--tl-info-blue-light); margin-right: 0.25rem; vertical-align: middle; }
.ai-reason { font-size: 0.78rem; opacity: 0.7; }
.ai-issues li { margin-bottom: 0.5rem; }
.ai-report-header { text-align: center; margin-bottom: 1rem; }
.ai-report-header h2 { font-size: 1.1rem; margin-bottom: 0.25rem; }
.ai-report-vehicle { font-size: 0.9rem; opacity: 0.8; }
.ai-report-date { font-size: 0.75rem; opacity: 0.5; }
.ai-report-score { text-align: center; margin: 0.5rem 0; }
.ai-report-section { margin-bottom: 1rem; padding-bottom: 0.75rem; border-bottom: 1px solid rgba(255,255,255,0.08); }
.ai-report-section h3 { font-size: 0.9rem; margin-bottom: 0.35rem; }
.ai-section-score { font-size: 0.78rem; margin-left: 0.5rem; }
.ai-report-footer { margin-top: 1rem; padding-top: 0.5rem; border-top: 1px solid rgba(255,255,255,0.1); font-size: 0.75rem; opacity: 0.5; text-align: center; }
.ai-full-report { max-width: 800px; }

/* ── Speaker & Amp table field widths ── */
#speakerTableBody select { min-width: 130px; }
#speakerTableBody input[type="text"] { min-width: 90px; }
#ampTableBody select { min-width: 110px; }
#ampTableBody input[type="text"] { min-width: 90px; }

/* ── Accessibility: Focus indicators ─────────────────────── */
/* :focus fallback for browsers that don't support :focus-visible */
button:focus, .btn:focus, a:focus,
input:focus, select:focus, textarea:focus,
[tabindex]:focus {
  outline: 2px solid var(--tl-accent);
  outline-offset: 2px;
}
/* Remove outline on mouse/pointer click for supporting browsers */
button:focus:not(:focus-visible), .btn:focus:not(:focus-visible), a:focus:not(:focus-visible),
input:focus:not(:focus-visible), select:focus:not(:focus-visible), textarea:focus:not(:focus-visible),
[tabindex]:focus:not(:focus-visible) {
  outline: none;
}
/* :focus-visible for keyboard/accessibility navigation */
button:focus-visible, .btn:focus-visible, a:focus-visible,
input:focus-visible, select:focus-visible, textarea:focus-visible,
[tabindex]:focus-visible {
  outline: 2px solid var(--tl-accent);
  outline-offset: 2px;
}

/* ── Professional Wiring Recommendations Table ─────────────────────── */
#hwWiringRecommendationsBody tr {
  border-left: 4px solid var(--tl-border-left);
  transition: background-color 0.2s ease;
}
#hwWiringRecommendationsBody tr:hover {
  background-color: rgba(var(--tl-accent-rgb), 0.05);
}

#hwWiringRecommendationsBody td {
  padding: 12px 14px;
  border-bottom: 1px solid var(--tl-border-bottom);
  font-size: 13px;
  line-height: 1.6;
}

.tl-wiring-spk {
  color: var(--tl-text-lighter4);
  font-weight: 500;
  max-width: 220px;
  white-space: pre-wrap;
}
.tl-wiring-spk + td { color: var(--tl-text-light-muted); }

.tl-wiring-amp {
  color: var(--tl-text-light-accent);
  font-weight: 500;
  white-space: pre-wrap;
}

.tl-wiring-gauge {
  color: var(--tl-warning-gold);
  font-weight: 600;
  text-align: center;
}

.tl-wiring-fuse {
  color: var(--tl-text-purple);
  font-weight: 500;
}

.tl-wiring-match {
  font-weight: 600;
  text-align: center;
  padding: 8px 12px;
  border-radius: 4px;
}
.tl-wiring-match-ideal {
  color: #fff;
  background-color: rgba(46, 204, 113, 0.2);
  border: 1px solid rgba(46, 204, 113, 0.4);
  color: var(--tl-success);
}
.tl-wiring-match-acceptable {
  color: #fff;
  background-color: rgba(168, 216, 168, 0.15);
  border: 1px solid rgba(168, 216, 168, 0.3);
  color: var(--tl-success-fade);
}
.tl-wiring-match-marginal {
  color: #fff;
  background-color: rgba(243, 156, 18, 0.15);
  border: 1px solid rgba(243, 156, 18, 0.3);
  color: var(--tl-warning);
}
.tl-wiring-match-warning {
  color: #fff;
  background-color: rgba(231, 76, 60, 0.15);
  border: 1px solid rgba(231, 76, 60, 0.3);
  color: var(--tl-danger);
}

.tl-wiring-comments {
  color: var(--tl-text-light-muted);
  font-size: 12px;
  white-space: pre-wrap;
  max-width: 280px;
}

/* System summary box below wiring table */
#hwWiringSystemSummary {
  margin-top: 20px;
  padding: 16px;
  background: rgba(76, 111, 255, 0.08);
  border: 1px solid rgba(76, 111, 255, 0.2);
  border-radius: 8px;
}

.tl-wiring-summary {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.tl-summary-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 13px;
}

.tl-summary-label {
  color: var(--tl-text-lighter5);
  font-weight: 500;
}

.tl-summary-value {
  color: var(--tl-text-lighter4);
  font-weight: 600;
  font-family: 'Courier New', monospace;
}

.tl-summary-warnings {
  margin-top: 12px;
  padding-top: 12px;
  border-top: 1px solid rgba(76, 111, 255, 0.2);
}

.tl-summary-warnings .tl-summary-label {
  color: var(--tl-warning);
  margin-bottom: 8px;
}

.tl-warning-item {
  color: var(--tl-danger-lightest);
  font-size: 12px;
  margin-bottom: 6px;
  padding-left: 8px;
}

/* ═══════════════════════════════════════════════════════════════════════
   GLOBAL TEXT COLOR COERCION — Steve directive 2026-04-21
   "ALL fonts on every page that is any shade of Gray or off white should
    become bright white"
   Redefines all muted/dim/light text CSS variables to pure white, and
   adds blanket overrides to coerce inline gray hex colors to #fff.
   Colors that ARE meant to be colorful (accents, status, danger, etc.)
   are preserved — only grays/off-whites are forced to #fff.
   ═══════════════════════════════════════════════════════════════════════ */
:root {
  /* Coerce muted/dim/light text variables to pure white */
  --tl-text: #ffffff;
  --tl-text-muted: #ffffff;
  --tl-text-dim: #ffffff;
  --tl-text-light: #ffffff;
  --tl-text-lighter: #ffffff;
  --tl-text-lighter2: #ffffff;
  --tl-text-lighter3: #ffffff;
  --tl-text-lighter4: #ffffff;
  --tl-text-lighter5: #ffffff;
  --tl-text-lighter6: #ffffff;
  --tl-text-lighter7: #ffffff;
  --tl-text-light-gray: #ffffff;
  --tl-text-gray: #ffffff;
  --tl-text-light-muted: #ffffff;
}

/* Inline style coercion — override any element with an inline gray hex
   color to bright white. Uses !important to beat inline style specificity. */
[style*="color:#888"],
[style*="color: #888"],
[style*="color:#999"],
[style*="color: #999"],
[style*="color:#aaa"],
[style*="color: #aaa"],
[style*="color:#bbb"],
[style*="color: #bbb"],
[style*="color:#ccc"],
[style*="color: #ccc"],
[style*="color:#ddd"],
[style*="color: #ddd"],
[style*="color:#666"],
[style*="color: #666"],
[style*="color:#777"],
[style*="color: #777"],
[style*="color:#555"],
[style*="color: #555"],
[style*="color:#e0e0e0"],
[style*="color: #e0e0e0"],
[style*="color:#d0d0d0"],
[style*="color: #d0d0d0"],
[style*="color:#c0c0c0"],
[style*="color: #c0c0c0"],
[style*="color:#b0b0b0"],
[style*="color: #b0b0b0"],
[style*="color:#a0a0a0"],
[style*="color: #a0a0a0"],
[style*="color:#f0f2f7"],
[style*="color: #f0f2f7"],
[style*="color:#e2e6f0"],
[style*="color: #e2e6f0"],
[style*="color:#94a3b8"],
[style*="color: #94a3b8"],
[style*="color:#cbd5e1"],
[style*="color: #cbd5e1"],
[style*="color:#9ca3af"],
[style*="color: #9ca3af"],
[style*="color:#e2e8f0"],
[style*="color: #e2e8f0"],
[style*="color:#b0b8cc"],
[style*="color: #b0b8cc"],
[style*="color:#8a9bc0"],
[style*="color: #8a9bc0"],
[style*="color:#a0afc0"],
[style*="color: #a0afc0"],
[style*="color:#c3c7de"],
[style*="color: #c3c7de"],
[style*="color:#d0d4e4"],
[style*="color: #d0d4e4"],
[style*="color:#c0c8dc"],
[style*="color: #c0c8dc"],
[style*="color:#cad"],
[style*="color: #cad"],
[style*="color:#aaa"],
/* 2026-04-24 audit additions — additional gray/off-white inline colors */
[style*="color:#8899bb"],
[style*="color: #8899bb"],
[style*="color:#c9d1d9"],
[style*="color: #c9d1d9"],
[style*="color:#d1d5db"],
[style*="color: #d1d5db"],
[style*="color:#8b949e"],
[style*="color: #8b949e"],
[style*="color:#e7ecff"],
[style*="color: #e7ecff"],
[style*="color:#e8ecf8"],
[style*="color: #e8ecf8"],
[style*="color:#e8eefc"],
[style*="color: #e8eefc"],
[style*="color:#c8d0f0"],
[style*="color: #c8d0f0"],
[style*="color:#b0c4d4"],
[style*="color: #b0c4d4"],
[style*="color:#b8c8d8"],
[style*="color: #b8c8d8"],
[style*="color:#ccd8e8"],
[style*="color: #ccd8e8"],
[style*="color:#dde8f0"],
[style*="color: #dde8f0"],
[style*="color:#f5f5f5"],
[style*="color: #f5f5f5"],
[style*="color:#f5f5f7"],
[style*="color: #f5f5f7"],
[style*="color:#f0f2f5"],
[style*="color: #f0f2f5"],
[style*="color:#e8e6e3"],
[style*="color: #e8e6e3"],
[style*="color:#8a8a8a"],
[style*="color: #8a8a8a"],
[style*="color:gray"],
[style*="color: gray"],
[style*="color:lightgray"],
[style*="color: lightgray"],
[style*="color:darkgray"],
[style*="color: darkgray"],
[style*="color:silver"],
[style*="color: silver"],
[style*="color:rgba(255,255,255,0.3)"],
[style*="color:rgba(255,255,255,0.4)"],
[style*="color:rgba(255,255,255,0.5)"],
[style*="color:rgba(255,255,255,0.6)"],
[style*="color:rgba(255,255,255,0.7)"],
[style*="color:rgba(255, 255, 255, 0.3)"],
[style*="color:rgba(255, 255, 255, 0.4)"],
[style*="color:rgba(255, 255, 255, 0.5)"],
[style*="color:rgba(255, 255, 255, 0.6)"],
[style*="color:rgba(255, 255, 255, 0.7)"] {
  color: #ffffff !important;
}